What is Schwann cells? Schwann cell, also called neurilemma cell, any of the cells in the peripheral nervous system that produce the myelin sheath around neuronal axons. Schwann cells are named after German physiologist Theodor Schwann, who discovered them in the 19th century. How do Schwann cells work? The way Schwann cells work is because […]
Which drugs come form plants and microorganisms? These are the drugs which come from plants : Opium poppy (heroin, morphine, codeine) Blue agave (Tequila) Coca leaves (cocaine) Ephedra sinica (Sudafed, meth) Psilocybin mushroom (shrooms) Willow bark (aspirin) Sassafras root (ecstasy) Penicillium mold (penicillin) These are the drugs which come form micro organisms : Belladonna alkaloids […]
Explain what an antibody is in your own words? An antibody is when the blood from the blood is formed to neutralize the antigen (a toxin or other foreign substance in the body). Antibodies come together to fight off an antigen which the body recognizes as usual. Examples of antigens are viruses, bacteria, unfamiliar substances […]
The process of transpiration is when water moves through plants from the roots to the leaves, then changes to vapor as it leaves the plant. Transpiration cools the plant and also provides it with nutrients, carbon dioxide and water. Water is necessary for plants but only a small amount of water taken up by the roots […]
The google definition of Stem Cells : ‘An undifferentiated cell of a multi cellular organism which is capable of giving rise to indefinitely more cells of the same type, and from which certain other kinds of cell arise by differentiation.’ The google reason why stem cells are controversial is : The stem cell controversy is […]
Task 1 : Use a light microscope State why microscopes are useful in the study of cell biology Calculate total magnification To calculate magnification the formula you have to do: length of magnified divided by the length of object The invention of the microscope has opened up a whole new dimension in science. By using microscope scientists were […]
Lichens can be used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. Lichens are plants that grow in exposed places such as rocks or tree bark. They need to be very good at absorbing water and nutrients to grow there.
Natural Selection is the process by which random evolutionary changes are chosen for by nature in a normal, same, orderly, non-random way. An example is the Main Land Tortoise and Island Tortoises. A Tortoise from the main land might have possibly traveled on a raft to get the the island. Once it arrived it laid […]